Enable INLINE_THRESHOLD warning for core kernel compilation.

    - The numba_dpex.core.kernel_interface.disptcher.JitKernel
      is not a true numba Dispatcher class and as such does not
      fully use targetoptions.

      As such the commit adds a temporary work around to set the
      code library inline_threshold only using the
      config.INLINE_THRESHOLD environment flag.

      Unit tests were updated as well.

Author: Diptorup Deb

numba_dpex/core/kernel_interface/spirv_kernel.py

@@ -136,6 +136,15 @@ def compile(
         kernel = cres.target_context.prepare_spir_kernel(
             func, cres.signature.args
         )
+
+        # XXX: Setting the inline_threshold in the following way is a temporary
+        # workaround till the JitKernel dispatcher is replaced by
+        # experimental.dispatcher.KernelDispatcher.
+        if config.INLINE_THRESHOLD is not None:
+            cres.library.inline_threshold = config.INLINE_THRESHOLD
+        else:
+            cres.library.inline_threshold = 0
+
         cres.library._optimize_final_module()
         self._llvm_module = kernel.module.__str__()
         self._module_name = kernel.name

numba_dpex/tests/misc/test_warnings.py

@@ -1,6 +1,7 @@
-import logging
+import warnings
 
 import dpnp
+import pytest
 
 import numba_dpex as dpex
 import numba_dpex.config as config
@@ -15,28 +16,23 @@ def test_opt_warning(caplog):
     bkp = config.DPEX_OPT
     config.DPEX_OPT = 3
 
-    with caplog.at_level(logging.WARNING):
+    with pytest.warns(UserWarning):
         foo[dpex.Range(10)](dpnp.arange(10))
 
     config.DPEX_OPT = bkp
 
-    assert "NUMBA_DPEX_OPT" in caplog.text
-
 
 def test_inline_warning(caplog):
     bkp = config.INLINE_THRESHOLD
-    config.INLINE_THRESHOLD = 2
+    config.INLINE_THRESHOLD = 3
 
-    with caplog.at_level(logging.WARNING):
+    with pytest.warns(UserWarning):
         foo[dpex.Range(10)](dpnp.arange(10))
 
     config.INLINE_THRESHOLD = bkp
 
-    assert "INLINE_THRESHOLD" in caplog.text
-
 
 def test_no_warning(caplog):
-    with caplog.at_level(logging.WARNING):
+    with warnings.catch_warnings():
+        warnings.simplefilter("error")
         foo[dpex.Range(10)](dpnp.arange(10))
-
-    assert caplog.text == ""